puzzlescript/lib/lruCache.js

Play PuzzleScript games in your terminal!

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
class QuickLru {
    constructor(maxSize) {
        this.maxSize = maxSize;
        this.size = 0;
        this.cache = {};
        this.oldCache = {};
    }
    set(key, value) {
        const has = typeof this.cache[key] !== 'undefined' || typeof this.oldCache[key] !== 'undefined';
        if (this.size > this.maxSize) {
            this.oldCache = this.cache;
            this.size = 0;
        }
        if (!has) {
            this.cache[key] = value;
            this.size++;
        }
    }
    get(key) {
        const value = this.cache[key];
        if (typeof value !== 'undefined') {
            return value;
        }
        return this.oldCache[key];
    }
}
class LruCache {
    constructor(maxSize) {
        this.lru = new QuickLru(maxSize);
    }
    get(key, valueFn) {
        const val = this.lru.get(key);
        // speed up by combining .has(key) and .get(key)
        if (val !== undefined) {
            return val;
        }
        const value = valueFn();
        this.lru.set(key, value);
        return value;
    }
}
exports.default = LruCache;
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